- Joined
- Aug 28, 2017
- Messages
- 359
I always used to just shoot at 100yds for groups when doing load development. Wanted to try something like OCW for once. I put together a rifle in 700 action chambered in 7-08AI with Bartlein 3B 8.7 twist. Finished at 20" (I know, that's what owner wanted).
Hornady brass with WLR primers.
Berger 150 Classic Hunter at @2.737" COL just into lands.
VVN550 powder. Shot at 300yds. Slight wind from right.
Note: this is with once fired brass from same chamber that did not fully fireform. After this second firing, headspace comparator showed mostly equal measurements instead of many short from first firing.
1 42.0 2520
2 42.5 2614
3 43.0 2635
4 43.5 2661
5 44.0 2650
6 44.5 2645
7 45.0 2743 bolt started sticking a little (not on lift, on extracting)
8 45.5 2795
9 46.0 2824
Do I load up 3 of each from maybe 4,5,6 and shoot for groups, or am I wasting time until all cases are fired the second time?
****Edited to add: Optical Chrono placed 10' in front of muzzle
Hornady brass with WLR primers.
Berger 150 Classic Hunter at @2.737" COL just into lands.
VVN550 powder. Shot at 300yds. Slight wind from right.
Note: this is with once fired brass from same chamber that did not fully fireform. After this second firing, headspace comparator showed mostly equal measurements instead of many short from first firing.
1 42.0 2520
2 42.5 2614
3 43.0 2635
4 43.5 2661
5 44.0 2650
6 44.5 2645
7 45.0 2743 bolt started sticking a little (not on lift, on extracting)
8 45.5 2795
9 46.0 2824
Do I load up 3 of each from maybe 4,5,6 and shoot for groups, or am I wasting time until all cases are fired the second time?
****Edited to add: Optical Chrono placed 10' in front of muzzle
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